Draw-gear apparatus.



J.'}`. GOURSON,

DRAW GEAR APPARATUS.

' APPLIGATIUN FILED AUG. e, 190B.

Patented Aug. 17, 1909.

3 SHEETS-SHEET l.

J. F, COURSON. DRAW GEAR APPARATUS.

APPLICATION FILED AUG. s, 190s.

3 SHEETS-SHEET 2.

Patente Aug. 17, 1909.

` yJ. F; COURSN.-

DRAW GEAR APPARATUS.

APPLIoAgTIoN FILED AUG. s, 190B.

931,682. .Patented Aug. 17, ww.

s SHEETS-SHEET s.

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JOHN F. COURSON, OF PITCAIRN, PENNSYLVANEA.

onanieren reassess To all whom 'it may concern:

Be it known that l, JOHN F. Courson', a

citizen of the Unit-ed States, residing at Eitcairn, Pennsylvania, have invented certain new and useful Improvements in Draw-Gear In the accompanying drawings,`-Figure 1- is a planview of the draw gear; Fig. 2 is a plan view showing a number of the parts in section and with the apparatus free from both butling and pulling strains; Fig. 3 is a sectional'plan view similar to Fig. 2 with the par-ts in a ditferent position from that of Fig. 9.; Fig. al is a cross sectionsy view through the apparatus; Fig. 5 is a sectional view of one of thel friction blocks; Fig'. fr1

an end view of said block; F ig. 6 is a sectional view of the ot-hcr friction block; Fig. (3a is an end view of the friction bloeit shown in Fig. 6; Fig. 7 shows two views of the wedge block; Fig. 8 is a detail view of the member which presses upon lthe wedge blo Fig. 9 is a detail plan view of a compound back stop and filling piece; Fig. i is a` sectional View of said filling piece; Fig. l1 a front. view of said filling piece; Fig. 12 a detail view of the yoke; Fig. 13 is detail view of the back filling piece or follower for the draft gear.

In these drawings, 1 indicates the coupler shank; 2 the front stops consisting of angle iron pieces riveted to the car sills'i: #lindicates a huling device. This consi s ef a disk portion il and astein portion Ll", indicates a cylinder arranged between the sills and containing therein a pair of friction :blocks (l and "7. n rear of these fil-lotion :blotks .are springs 8, 9 and 10 nested one `hin the other. ln rear of the springs is "ranged a filling piece or block 11, this havs 1mg a head portion fitting within the cylinder and .a stem portion extending' rearwardly through an lLupetti-rig in the end of the cylinhis stein hears at its rear end upon a back -stop 12 `which is arranged between the Specification of Letters Patent.

Application tiled August 6,

?a.tented Aug. 17, 1909.

1998. Serial No. 4.472%.

`center sills 3 and acts not only as a back stop, but as a strengthening piece. rlhis back stop is provided with an opening at a, and through this notch `or opening the rear end of the yoke 13 extends. The end of this yoke is bolted or riveted to the coupler shank, while its rear end is provided with a back filling piece 14 against which the lil-ling hlocl-r 11 is adapted to bear. The back stop or strengthening piece 12 is securely riveted or bolted to the center sill.

15 and 1G indicate part of the bodyholster.

At 17 is indicated an ordinary center sill cover plate for a steel car.

18 indicates the top section ofthe body bolster, and 19 the bottom section or plate.

21 indicates a plate fastened to the bottom of the center sills to hold the draft gear apparatus in place.

At l show a wedge block which is arranged between the friction blocks't and 7. These. friction blocks, it will be noted, are provided with inter-engaging projections, the faces of which are inclined so that the movenient of one friction block in relation to the other in a` direction longitudinally `ofthe draft gear will result. in a spreading action of the said friction blocks againstthe interior of the cylinder This cylinder, it will be noted, is, tapered on its interior toward the rear.

Figs. 2 and 3 show the ditte-.rentv positions that the parts assume. Under either luft"- ing or pulling strains the stein lb of the hailing' piece 4 will, by pressure upon the wedge block Q0, cause this block in turn to .press upon the friction blocks 6 and 7, and, by reason of the inclined contacting surfaces of the .vedge block and the friction blocks, the said frictionhloclts will he forced apart and into frictional contact with the interior of the cylinder and, as this cylinder taper s interior-ly toward the rear, a strong frictional resistance will liejiiforded to absorb baiting and pulling strains. 0f course the hailing and pulling strains are also absorbed by the springs varranged between the rear ends of the friction blocks and the filling extending at an inclination to and transsubstantially as described.

inclined to the axial line thereof. In bufftlie desired compression before the friction I (5 toward the rear, while the friction block 7 -rality of friction blocks, a wedge block havloosely interposed between them, anda buff- 'tion means within the same, a builing pressure of the buffing stem 4b upon the' wedge block 20. It will be observed that this wedge block has a trend of movement in a direction laterally of the draw gear and ing oi' pulling, the filling block 11 moves slightly into the cylinder, giving the spring ineinbers act. Only one of the friction blocks bears upon the spring, and it receives all shock in buiiing or pulling through the angular shaped wedge block.L The Wedge block 20, when piessed by the buffing stem il in a direction laterally and inclined to the axis of the diaw'gear, will, in pressing the friction blocks apart, force the fi'iction block will be forced toward the front, and in this position it serves to hold or lock the friction blocks until the shock is over, When the spring, reacting, will force the parts into their normal relative positions.

I do notv limit myself' to any 'particular form of angular piece or block 2O norvits precise combination and location between two friction blocks, as other arrangen'ients of this loose wedge and locking block may be devised. I do not limit myself tothe number of wedge blocks which may be used, nor do I limit myself to forming the butling stem 4b and its heador disk l? of two pieces.-

I claim asmy invention l. In combination in a draw gear, friction members, a wedge block extending at an inclination to and transversely of the axial line of the draft gear, saidwedge block bcinginterposed between the friction inem-v bers, substantially as described.

2. In combination in a draw gear, a pluing'surfaces inclined to different degrees and versely/ofthe axial line of the draft gear and interposed between the frictionmernbers withits inclines bearing thereon, with mea-ns for operating the said wedge blocl{ 3. In combination in a draw gear, :ri-plurality of friction members, a wedge block ing stem eiigaging'the wedge block, said wedge block extending transversely of the line of draft, substantially as described.

4.-. In combination with a cylinder, fricstein arranged axially of the cylinder and adapted to be operated by pressure from the coupler, a wedgeblock movable transversely of the line of draft and-pressed upon by the stein, a yoke surrounding the cylinder and a i fillingl piece bearing upon the yokeandextending into the cylinder to operate the re-AY sistance means, substantially as described.

5. In combination in apparatus of the class described, a plurality of friction blocks having interengaging portions with inclined faces, and a wedge block movable transversely of the line of draft and having inclined faces bearing upon inclined faces on the friction blocks to force them in opposite directions,'both laterally and longitudinally, substantially as described.

6. In combination in a draw gear, friction means and a wedge block disposed as a Whole at an inclination to the line of draftwithin the said friction means, and having 4opposite faces alsoinclined to the line of draft and axial line of the draft gear, said wedge block having its inclined surfaces bearing on the inclined surfaces of the friction blocks and forcing tlieni in opposite directions both laterally and longitudinally, and

' means for operating the wedge block, substantially as described.

8. In combination in`a draw-gearja'pair of friction blocks, a triangular shaped block -movable transversely of the line of draft for spreading said friction blocks and having cach of its faces inclined to the line of draft, and means for transmitting the strains Ldirectly to one of the inclined faces of the said transversely movable block, substantially as' described.

9. In combination in a draft gear, a pair of friction blocks, one having a recess extending transversely to the line of draft, and a wedge block arranged at an inclination to the line of draft and movable ina direction inclined to said draft line, l said friction blocks having interengaging inclined surfaces, substantially as described.

10. In combination in a draft gear, a pair of friction blocks, one having a'recess extending transversely of the line of draft, a

'wedge block arranged at an inclination to the line of draftvand fitting in said recess, and each .of the friction blocks having interengaging inclined faces` on each side of the I wedge block.

'In testimony wheredf, I aiiix my signature in presenceof two witnesses.

JOHN I". COURSON. Witnesses:

JOHN' A. I/VILSON, JAS. A. iflriioss.

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